(19)
(11) EP 0 233 526 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.04.1989 Bulletin 1989/17

(43) Date of publication A2:
26.08.1987 Bulletin 1987/35

(21) Application number: 87101287.8

(22) Date of filing: 30.01.1987
(51) International Patent Classification (IPC)4: G01J 1/44, H01L 27/14, G03B 3/10
(84) Designated Contracting States:
DE FR GB

(30) Priority: 03.02.1986 US 825702

(71) Applicant: HONEYWELL INC.
Minneapolis Minnesota 55408 (US)

(72) Inventor:
  • Wilwerding, Dennis J.
    Littleton Colorado 80120 (US)

(74) Representative: Herzbach, Dieter, Dipl.-Ing. et al
Honeywell Holding AG Patent- und Lizenzabteilung Postfach 10 08 65
D-63008 Offenbach
D-63008 Offenbach (DE)


(56) References cited: : 
   
       


    (54) Radiation sensing apparatus


    (57) A radiation sensing apparatus uses a separate radiation detector (60) shielded by a radiation blocking member (68) to load an empty bucket (92) of a shift register with a charge according to the dark current of said separate radiation detector (60). This charge is used as a subtracting value for each of the other information containing buckets (93, 95, 97) before they are fed to a sensitive electronics (Fig.3).






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